Ubuntu
libxcb package

  1. Bug #277069
  2. Comment #31

Comment 31 for bug 277069

Revision history for this message
In , Joakim Plate (elupus) wrote :

I think this could be related to what I was experiencing for GLX over network.

Running any GLX application over network was horribly slow. I then found out that running GLX application over network loopback on the same machine was event slow. Ie i tested the following.

DISPLAY=localhost:0.0 LIBGL_ALWAYS_INDIRECT=1 xbmc
vs
DISPLAY=:0.0 LIBGL_ALWAYS_INDIRECT=1 xbmc

where xbmc being XBMC Media Center is a opengl application. The first test gave a fps of 10, while the second a fps 40 on my hardware. After some pondering i thought about the nagle algorithm.

After modifying libxcb to disable the nagle algorthim, the above two commands rendered at about the same speed of 40fps.

I'll attach a diff.